Скачать или смотреть Workaround for Next.JS Error: document is not defined in External Library Integration

Discover how to solve the Next.JS error `document is not defined` when integrating external React components like `react-calendly`, enabling seamless SSR functionality in your applications.
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Addressing the Next.JS document is not defined Error with External Libraries

When integrating external libraries in a Next.js application, you might encounter the frustrating error: document is not defined. This typically results from Next.js using Server-Side Rendering (SSR), which means that document—a browser-specific object—is not accessible during the server-side rendering phase.

In this guide, we will explore a practical workaround to effectively integrate the react-calendly component, particularly the PopupButton, into your Next.js app without running into this error.

Understanding the Problem

The Next.js framework relies on SSR for improved performance and SEO benefits. However, this can lead to challenges when working with external libraries that depend on the document object.

In your specific use case, you require the PopupButton from react-calendly to bind to a parent DOM node. Because you cannot directly access document during the initial render on the server, you need a strategy to delay the rendering of such components until the client-side rendering occurs.

The Solution Breakdown

By following these steps, you can successfully work around the document is not defined issue:

Step 1: Create a Parent Component

First, you'll need a parent React component that calls your dynamic Calendly component. Here's how you can structure it:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Create a Dynamic Component

In your Calendly Dynamic component, utilize Next.js's dynamic importing feature to ensure that this component is rendered only on the client side (i.e., during the browser's rendering phase). Here's the code:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Implement the Calendly Child Component

This is where you will utilize the PopupButton. We will delay the activation of this button until the component is mounted, using React's useEffect to access the document object safely:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By executing these steps, you will eliminate the document is not defined error and successfully integrate the react-calendly component into your Next.js application.

These techniques not only resolve the immediate issue but also empower you with better practices for handling client-only components in an SSR context. As you progress in your React and full-stack development journey, remember that embracing Next.js's SSR capabilities brings significant advantages to your web applications.

Implement this solution, and you should now be able to use external libraries without running into SSR-related errors! Happy coding!